Manus detention centre security beef-up

Reza Barati was beaten so brutally during a riot at an Australian-run immigration detention centre in Papua New Guinea that no amount of First-World medical care could have saved him.

The treating doctor who watched the 23-year-old Iranian asylum seeker die believed there was no saving Mr Barati who went into cardiac arrest after his skull was shattered causing catastrophic brain injury.

"In the treating doctor's opinion, Mr Barati would not have survived this injury even if it had occurred in, say, Sydney and he received the best available medical care in that city," the report of an independent review into February's violence at Manus Island said.

The report said a local PNG man employed at the centre by the Salvation Army led the "brutal beating".

The Salvation Army said it condemns any criminal behaviour and any illegal action which may have taken place, occurred without its knowledge.

Immigration Minister Scott Morrison has accepted the review's 13 recommendations, including a beef-up of security, granting guards powers to search asylum seekers and allowing them to use appropriate force.

The detention centre will get new fencing, extra lighting and security cameras.